The render signal that reaches the IE is already normalized and compressed by an AGC on the far-end capture processing. Because the noise estimation is done before the AGC compression, we need to compensate for this gain in the IE to be able to compare these 2 powers. Review-Url: https://codereview.webrtc.org/1913603002 Cr-Commit-Position: refs/heads/master@{#12549}